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Chronic smokers often have difficulty breathing because they develop Chronic Obstructive Pulmonary Disorder, or COPD. The two diseases that fall under that category are emphys â¦ ema and chronic bronchitis.
Causes: Smoking irritates the airways causing a cough, which in the long-term can be a sign of COPD - chronic obstructive pulmonary disease, including emphysema and chronic bronchitis - meaning there's irreversible damage to your airways, worsening if you continue puffing away.